Hi, my co-author's name doesn't appear in the dropdown list when I am writing his name. And so, I can't add my co-authors even though I am following them.
There is an option to add their email if researchgate doesn't display their profile in the list. Alternatively, add the name in full, and after a few data, researchergate will message them to ask if it is their paper. Hope this helps.
Thank you all, well the problem is that the researcher is already a member of Researchgate and has uploaded a whole lot of papers himself, but I cannot find his name to add him even though with full details.
I see. I once had a similar issue so what I did was to write names exactly the way they are on researchgate then few days later I received an email asking me to confirm if they were coauthor of the article and the link had the very same profile picture on researchgate of the right coauthor.